With the atmospheric models specified, we now look into how the phase screens are constructed so as to mimic the effects of the turbulence. Each individual phase screen is created
by performing a fast Fourier transform over a uniform square grid of random
complex numbers, sampled from a Gaussian distribution with
zero mean and variance, given by the spectral density function [1]}
\(\Phi _{\phi }(\kappa ) = 0.49 r_0^{-5/3} \frac{\exp (-\kappa ^2/\kappa ^2_m)}{{(\kappa ^2 + \kappa _0^2)}^{11/6}},\) 
